Prints version information for easy pasting into Bug Reporter. Use it like this:
$ vers [product]
where [product] is one of the following:
- Mac: Hardware information in the form "MacBook Pro (Retina, 13-inch, Early 2015)"
- macOS: Operating system information in the form "macOS High Sierra 10.13.1 Beta (17B35a)"
- Xcode: Xcode information for Xcode (or Xcode-beta, if it's available) in the form "Xcode Version 9.1 beta (9B46)"